Mass Effect 2: Saving Legion

Later in the game you will be told by the Illusive Man that there is a Derelict Reaper in space somewhere and he wants you to aquire a 'Reaper IFF' that is onboard it. You have the choice to go there now or later, it doesn't really matter, you can choose yourself. Onboard the Reaper you find out the fate of some Cerberus Scientists that were sent there, they have been turned into Husks(indoctrinated humans who have been transformed). After you fight your way through alot of those you then find the Reaper IFF, then after that you come to a door, which is where this scene begins, enjoy.